Container registry: missing elipsis on tag name

Problem

Currently, for very long tag names, the name can span two rows and the copy icon goes to a new line. This can create a jarring experience and disconnects the button's action from its context.

Solution

We should fix this, have the tag name on a single line and add an elipsis if the name exceeds a dynamic width, ensuring there is always space for the copy button on the same line.